| /* | |
| * Copyright (c) 2021 Loongson Technology Corporation Limited | |
| * Contributed by Xiwei Gu <guxiwei-hf@loongson.cn> | |
| * | |
| * This file is part of FFmpeg. | |
| * | |
| * FFmpeg is free software; you can redistribute it and/or | |
| * modify it under the terms of the GNU Lesser General Public | |
| * License as published by the Free Software Foundation; either | |
| * version 2.1 of the License, or (at your option) any later version. | |
| * | |
| * FFmpeg is distributed in the hope that it will be useful, | |
| * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| * Lesser General Public License for more details. | |
| * | |
| * You should have received a copy of the GNU Lesser General Public | |
| * License along with FFmpeg; if not, write to the Free Software | |
| * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| */ | |
| static void prefetch_loongarch(const uint8_t *mem, ptrdiff_t stride, int h) | |
| { | |
| register const uint8_t *p = mem; | |
| __asm__ volatile ( | |
| "1: \n\t" | |
| "preld 0, %[p], 0 \n\t" | |
| "preld 0, %[p], 32 \n\t" | |
| "addi.d %[h], %[h], -1 \n\t" | |
| "add.d %[p], %[p], %[stride] \n\t" | |
| "blt $r0, %[h], 1b \n\t" | |
| : [p] "+r" (p), [h] "+r" (h) | |
| : [stride] "r" (stride) | |
| ); | |
| } | |
| av_cold void ff_videodsp_init_loongarch(VideoDSPContext *ctx, int bpc) | |
| { | |
| ctx->prefetch = prefetch_loongarch; | |
| } | |